Panasonic U-72MF1U9E Service & Technical Guide

Brand: Panasonic

Model: U-72MF1U9E

Category: Split-system air conditioners

Type: Service & Technical Guide

3WAY VRF System

Refrigerant R410A is used in the outdoor units.

* Salt-Air Damage Resistant Specifications.

** Necessary to install the External Electronic Expansion Valve Kit (Optional:CZ-P56SVK1U)

9672Class

Model Name

U-72MF1U9

U-96MF1U9

U-72MF1U9E* U-96MF1U9E*

U-72MF1U9

U-96MF1U9

U-72MF1U9E

U-96MF1U9E

85464869258000

REFERENCE NO.

TD831158-00

Indoor Units

Class 24 36 48 54

S-07MD1U6 S-09MD1U6 S-12MD1U6

S-07MF1U6 S-09MF1U6 S-12MF1U6 S-15MF1U6 S-18MF1U6

S-07MM1U6 S-09MM1U6 S-12MM1U6

S-07MK1U6 S-09MK1U6 S-12MK1U6

S-15MM1U6 S-18MM1U6

S-24MF1U6

S-07MP1U6 S-09MP1U6 S-12MP1U6 S-15MP1U6 S-18MP1U6 S-24MP1U6

S-07MR1U6 S-09MR1U6 S-12MR1U6 S-15MR1U6 S-18MR1U6 S-24MR1U6

S-12MT1U6 S-18MT1U6 S-24MT1U6

S-18MK1U6

S-19MS1U6

S-24MK1U6

S-36MF1U6 S-48MF1U6

S-36ME1U6 S-48ME1U6

S-54MF1U6

7 9 12 15 18

S-24MU1U6 S-36MU1U6S-12MU1U6 S-18MU1U6

S-12MY1U6 S-18MY1U6

Section

Outdoor Unit

Model No.

4-Way Cassette

1-Way Cassette

Low Silhouette Ducted

Ceiling

Wall Mounted

Concealed Floor

Standing

Floor Standing

4-Way Cassette 60×60

Slim Low Static Ducted

High Static Pressure

Ducted

IMPORTANT!

Please Read Before Starting

This air conditioning system meets strict safety and

operating standards. As the installer or service person, it

is an important part of your job to install or service the

system so it operates safely and efficiently.

For safe installation and trouble-free operation, you

must:

Carefully read this instruction booklet before beginning.

Follow each installation or repair step exactly as shown.

Observe all local, state, and national electrical codes.

Pay close attention to all warning and caution notices

given in this manual.

WARNING

This symbol refers to a hazard or

unsafe practice which can result

in severe personal injury or death.

CAUTION

This symbol refers to a hazard or

unsafe practice which can result

in personal injury or product or

property damage.

If Necessary, Get Help

These instructions are all you need for most installation

sites and maintenance conditions. If you require help for a

special problem, contact our sales/service outlet or your

certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for

improper installation or maintenance service, including

failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

WARNING

When Wiring

ELECTRICAL SHOCK CAN CAUSE

SEVERE PERSONAL INJURY OR DEATH.

ONLY A QUALIFIED, EXPERIENCED

ELECTRICIAN SHOULD ATTEMPT TO

WIRE THIS SYSTEM.

Do not supply power to the unit until all wiring and tubing •

•

are completed or reconnected and checked.

Highly dangerous electrical voltages are used in this •

system. Carefully refer to the wiring diagram and these

instructions when wiring. Improper connections and

inadequate grounding can cause accidental injury or

death.

Ground the unit following local electrical codes.

Connect all wiring tightly. Loose wiring may cause •

overheating at connection points and a possible fire

hazard.

To prevent possible hazards from insulation failure, •

the unit must be grounded.

When Transporting

Be careful when picking up and moving the indoor and

outdoor units. Get a partner to help, and bend your knees

when lifting to reduce strain on your back. Sharp edges or

thin aluminum fins on the air conditioner can cut your

fingers.

When Installing…

Select an installation location which is rigid and strong

enough to support or hold the unit, and select a location

for easy maintenance.

…In a Room

Properly insulate any tubing run inside a room to prevent

“sweating” that can cause dripping and water damage to

walls and floors.

CAUTION

Keep the fire alarm and the air

outlet at least 5 feet away from the

unit.

…In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a

solid, level foundation for the outdoor unit. This prevents

water damage and abnormal vibration.

…In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a

metal frame. Provide a suitable air baffle.

…In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher

than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

Ventilate the room well, in the event that is refrigerant •

gas leaks during the installation. Be careful not to allow

contact of the refrigerant gas with a flame as this will

cause the generation of poisonous gas.

Keep all tubing runs as short as possible.•

Use the flare method for connecting tubing.•

Apply refrigerant lubricant to the matching surfaces of •

the flare and union tubes before connecting them, then

tighten the nut with a torque wrench for a leak-free

connection.

Check carefully for leaks before starting the test run.•

WARNING

When performing piping work do •

not mix air except for specified

refrigerant (R410A) in refrigeration

cycle. It causes capacity down,

and risk of explosion and injury

due to high tension inside the

refrigerant cycle.

Refrigerant gas leakage may •

cause fire.

Do not add or replace refrigerant •

other than specified type. It may

cause product damage, burst and

injury etc.

Do not leak refrigerant while piping work for an •

installation or re-installation, and while repairing

refrigeration parts.

Handle liquid refrigerant carefully as it may cause

frostbite.

When Servicing

Turn the power OFF at the main power box (mains) •

before opening the unit to check or repair electrical

parts and wiring.

Keep your fingers and clothing away from any moving •

parts.

Clean up the site after you finish, remembering to check •

that no metal scraps or bits of wiring have been left

inside the unit being serviced.

WARNING

Do not clean inside the indoor and •

outdoor units by users. Engage

authorized dealer or specialist for

cleaning.

In case of malfunction of this •

appliance, do not repair by yourself.

Contact to the sales dealer or service

dealer for a repair.

CAUTION

Do not touch the air inlet or the

•

sharp aluminum fins of the

outdoor unit. You may get injured.

Ventilate any enclosed areas when •

installing or testing the refrigeration

system. Escaped refrigerant gas, on

contact with fire or heat, can produce

dangerously toxic gas.

Confirm after installation that no •

refrigerant gas is leaking. If the gas

comes in contact with a burning stove,

gas water heater, electric room heater

or other heat source, it can cause the

generation of poisonous gas.

Others

CAUTION

Do not touch the air inlet or the

•

sharp aluminum fins of the

outdoor unit. You may get injured.

Do not sit or step on the unit, •

you may fall down accidentally.

Do not stick any object into the •

FAN CASE.

You may be injured and the unit

may be damaged.

Check of Density Limit

The room in which the air conditioner is to be

installed requires a design that in the event of

refrigerant gas leaking out, its density will not

exceed a set limit.

The refrigerant (R410A), which is used in the air

conditioner, is safe, without the toxicity or combustibility

of ammonia, and is not restricted by laws imposed to

protect the ozone layer. However, since it contains more

than air, it poses the risk of suffocation if its density

should rise excessively. Suffocation from leakage of

refrigerant is almost non-existent.

With the recent increase in the number of high density

buildings, however, the installation of multi air

conditioner systems is on the increase because of the

need for effective use of floor space, individual control,

energy conservation by curtailing heat and carrying

power, etc.

Most importantly, the multi air conditioner system is able

to replenish a large amount of refrigerant compared to

conventional individual air conditioners. If a single unit of

the multi air conditioner system is to be installed in a

small room, select a suitable model and installation

procedure so that if the refrigerant accidentally leaks

out, its density does not reach the limit (and in the event

of an emergency, measures can be made before injury

can occur).

ASHRAE and the International Mechanical Code of the

ICC as well as CSA provide guidance and define

safeguards related to the use of refrigerants, all of which

define a Refrigerant Concentration Level (RCL) of 25

pounds per 1,000 cubic feet for R410A refrigerant.

For additional guidance and precautions related to

refrigerant safety, please refer to the following

documents:

International Mechanical Code 2009 (IMC-2009)

(or more recently revised)

ASHRAE 15

ASHRAE 34

iii

Manifold gauge Yes No Types of refrigerant, refrigerating machine

oil, and pressure gauge are different.

Charge hose Yes

Yes

Yes No

Yes

To resist higher pressure, material must be changed.

Vacuum pump Use a conventional vacuum pump if it is equipped

with a check valve. If it has no check valve,

purchase and attach a vacuum pump adapter.

Leak detector Leak detectors for CFC and HCFC that

react to chlorine do not function because

R410A contains no chlorine. Leak detector

for HFC134a can be used for R410A.

Flaring oil For systems that use R22, apply mineral oil (Suniso oil)

to the flare nuts on the tubing to prevent refrigerant

leakage. For machines that use R407C or R410A, apply

synthetic oil (ether oil) to the flare nuts.

1-2.

refrigerant deterioration and compressor defects. Due to the features of the refrigerant and refrigerating machine

oil, the prevention of water and other impurities becomes more important than ever.

2. Be sure to recharge the refrigerant only in liquid form.

2-1.

in the unit.

2-2. nce decreases when gas leaks, collect the remaining

refrigerant and recharge the required total amount of new refrigerant after fixing the leak.

3. Different tools required

3-1.

Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410A

Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and cause defects

Since refrigerant composition changes and performa

Tool specifications have been changed due to the characteristics of R410A.

Some tools for R22- and R407C-type refrigerant systems cannot be used.

Precautions for Installation Using New Refrigerant

1. Care regarding tubing

1-1. Process tubing

Material: Use C1220 phosphorous deoxidized copper specified in JIS H3300 “Copper and Copper Alloy Seamless

Pipes and Tubes.”

For tubes of ø7/8" (ø22.22 mm) or larger, use C1220 T-1/2H material or H material, and do not bend the tubes.

Tubing size: Be sure to use the sizes indicated in the table below.

Use a tube cutter when cutting the tubing, and be sure to remove any flash. This also applies to distribution joints

(optional).

When bending tubing, use a bending radius that is 4 times the outer diameter of the tubing or larger.

Manifold gauge

Vacuum pump

Outlet

Inlet

CAUTION

Use sufficient care in handling the tubing. Seal the tubing ends with caps or tape to

prevent dirt, moisture, or other foreign substances from entering. These substances

can result in system malfunction.

Unit: in. (mm)

OMaterial

Material

Copper tube

Unit: in. (mm)

1/2 H, H

Copper tube

Outer diameter

Wall thickness

Item

New

tool?

R407C tools

compatible

with R410A?

Remarks

* Using tools for R22 and R407C and new tools for R410A together can cause defects.

Outer diameter 1/4 (6.35) 3/8 (9.52) 1/2 (12.7) 5/8 (15.88) 3/4 (19.05)

Wall thickness 1/32 (0.8) 1/32 (0.8) 1/32 (0.8) 5/128 (1.0)

over 5/128 (1.0)

7/8 (22.22) 1 (25.4) 1-1/8 (28.58) 1-1/4 (31.75) 1-1/2 (38.1) 1-5/8 (41.28)

5/128 (1.0) 5/128 (1.0) 5/128 (1.0) 3/64 (1.1)

over 3/64 (1.15)

over

3/64 (1.20)

Valve

Liquid

3-2. Use R410A exclusive cylinder only.

Single-outlet valve

(with siphon tube)

Liquid refrigerant should be recharged

with the cylinder standing on end as

shown.

New refrigerant R410A cannot be used for

earlier models

1. Compressor specifications are different.

If recharging a R22 or R407C compressor with R410A,

durability will significantly decrease since some of the

materials used for compressor parts are different.

2. Existing tubing cannot be used (especially R22).

Completely cleaning out residual refrigerating

machine oil is impossible, even by flushing.

3. Refrigerating machine oil differs (R22).

Since R22 refrigerating machine oil is mineral oil, it

does not dissolve in R410A. Therefore, refrigerating

machine oil discharged from the compressor can cause

compressor damage.

R22 refrigerating machine oil Mineral oil (Suniso oil)

R407C refrigerating machine oil Synthetic fluid (ether oil)

R410A refrigerating machine oil Synthetic fluid (ether oil)

1-1

1. 1-2

2. 1-4

3. 1-7

2-1

1. 2-2

2. 2-18

3. 2-24

4. 2-32

4-3

3-1

10.

4-1

10.

5-1

1. 5-2

2. 5-3

3. 5-4

4. 5-6

5. 5-12

6. 5-12

7. 5-13

6-1

1. 6-2

7-1

1. 7-2

8-1

1. 8-2

2. 8-10

Contents

Line-up ............................................................................................................

Features of 3WAY VRF SYSTEM ....................................................................

Salt-Air Damage Resistant Specifications .......................................................

Model Selecting and Capacity Calculator .......................................................

System Design .............................................................................................

Electrical Wiring ............................................................................................

Installation Instructions .................................................................................

Main Operating Functions

Wireless Remote Controller

Timer Remote Controller

Simplified Remote Controller

System Controller

Schedule Timer

Intelligent Controller (CZ-256ESMC1U)

Communication Adaptor (CZ-CFUNC1U)

Remote Sensor

LonWorks Interface (CZ-CLNC1U)

Outdoor Unit ..................................................................................................

4-Way Cassette Type (U1 Type)

4-Way Cassette 60×60 Type (Y1 Type)

1-Way Cassette Type (D1 Type)

Low Silhouette Ducted Type (F1 Type)

Slim Low Static Ducted Type (M1 Type)

High Static Pressure Ducted Type (E1 Type)

Ceiling Type (T1 Type)

Wall Mounted Type (K1 Type)

Floor Standing Type (P1 Type)

11. Concealed Floor Standing Type (R1 Type)

12. Intaking Fresh Air of 4-Way Casstte Type and Slim Low Static Ducted Type

Preparing for Test Run ....................................................................................

Test Run Procedure ........................................................................................

Main Outdoor Unit PCB Setting ......................................................................

Auto Address Setting ......................................................................................

Remote Controller Test Run Settings ...........................................................

Caution for Pump Down ................................................................................

Meaning of Alarm Messages ........................................................................

Outdoor Unit ...................................................................................................

Indoor Unit

Outdoor Unit Control PCB ...............................................................................

Indoor Unit Control PCB Switches and Functions

Capacity Ratio of Outdoor Unit ......................................................................

Cooling Capacity of Indoor Unit ....................................................................

Section 5: TEST RUN .............................................................................................................

Section 6: ELECTRICAL DATA ..............................................................................................

Section 7: PCB AND FUNCTIONS ........................................................................................

Section 8: CAPACITY TABLE ................................................................................................

Section 1: OUTLINE OF 3WAY VRF SYSTEM ......................................................................

Section 2: DESIGN OF 3WAY VRF SYSTEM ........................................................................

Section 3: Control of 3WAY VRF SYSTEM ...........................................................................

Section 4: 3WAY VRF SYSTEM UNIT SPECIFICATIONS .....................................................

5. 2-40HOW TO PROCESS TUBING ......................................................................

6. 2-44AIR PURGING ..............................................................................................

7. 2-47Optional Parts ...............................................................................................

Refer to the 2WAY VRF SYSTEM TECHNICAL DATA (TD831157)

Outline of 3WAY VRF SYSTEM

1 - 1

Contents

1. Line-up ............................................................................................................................... 1-2

1-4

1-7

. Features of 3WAY VRF SYSTEM .......................................................................................

3. Salt-Air Damage Resistant Specifications .......................................................................

1. OUTLINE OF 3WAY VRF SYSTEM

Outline of 3WAY VRF SYSTEM

1 - 2

1. Line-up

Indoor units

Type 9 191815127 3624 48 54

S-12MU1U6 S-18MU1U6

S-12MY1U6 S-18MY1U6

S-24MU1U6 S-36MU1U6

S-24MK1U6S-18MK1U6

S-18MT1U6S-12MT1U6 S-24MT1U6

S-07MF1U6 S-12MF1U6 S-15MF1U6 S-18MF1U6S-09MF1U6 S-24MF1U6

S-07MP1U6 S-12MP1U6 S-15MP1U6 S-18MP1U6S-09MP1U6 S-24MP1U6

S-07MR1U6 S-12MR1U6 S-15MR1U6 S-18MR1U6S-09MR1U6 S-24MR1U6

S-48ME1U6

Wall Mounted

(K1 Type)

Low Silhouette

Ducted

(F1 Type)

Slim Low Static

Ducted

(M1 Type)

S-07MK1U6 S-09MK1U6 S-12MK1U6

S-07MD1U6 S-09MD1U6 S-12MD1U6

4-Way Cassette

(U1 Type)

4-Way Cassette

60 X 60

(Y1 Type)

Ceiling

(T1 Type)

1-Way Cassette

(D1 Type)

S-19MS1U6

High Static

Pressure Ducted

(E1 Type)

Floor Standing

(P1 Type)

Concealed Floor

Standing

(R1 Type)

S-36ME1U6

S-36MF1U6 S-48MF1U6 S-54MF1U6

S-07MM1U6 S-12MM1U6 S-15MM1U6 S-18MM1U6S-09MM1U6

* Necessary to install the External Electronic Expansion Valve Kit (Optional:CZ-P56SVK1U).

Outline of 3WAY VRF SYSTEM

1 - 3

1. Line-up

Outdoor units

Type

Capacity: BTU/h (kW)

72,000 (21.1)

Cooling / Heating

/ 81,000 (23.7)

Outdoor Unit

Capacity: BTU/h (kW)

Cooling / Heating

Outdoor Unit

U-96MF1U9

U-72MF1U9

unit : in.

U-72MF1U9E

U-96MF1U9E

Outdoor unit model name ended with letters "U9E". Refer to the Section 1 "3. Salt-Air Damage Resistant Specifications".

96,000 (28.1)

/ 108,000 (31.6)

Air

intake

Air

intake

Air discharge

Air intake

Air

intake

82-9/16

37-1/2

(Maximum dimensions)

(Ceiling panel dimensions)

Air

intake

Air

intake

Air discharge

Air intake

Air

intake

82-9/16

37-1/2

(Maximum dimensions)

(Ceiling panel dimensions)

Outline of 3WAY VRF SYSTEM

1 - 4

2. Features of 3WAY VRF SYSTEM

System example

* Panasonic makes it possible to link outdoor

unit together for a large capacity (24-Ton).

Since all pipings are concentrated

into one pipe shaft, you can minimize

piping space and construction labor

Maximum number of combined outdoor units

Maximum actual piping length

24-Ton

50~130%

492ft

984 ft

System limitations

If the additional installment of outdoor and indoor units are

expected, the size of refrigerant piping should be decided

according to the total capacity after the addition.

Maximum tonnage of combined outdoor units

Maximum number of connectable indoor units

Indoor/outdoor unit capacity ratio

Maximum level difference (when outdoor unit is lower)

Maximum total piping length

164 (131) ft

If indoor/outdoor units need servicing, a ball

valve (field supply) cuts off non-operational

units to let other units stay running.

If your indoor capacity load changes in the future, it’s easy to

add on both indoor and outdoor units using the same pipings.

ADDITION

CONCENTRATION

CONNECTION

Solenoid

valve kit

Indoor unit

Combination of outdoor units

R407C models and R22 models must not be used in combination with each other.

The DC inverter unit can be used independently or in combination.

Total

tonnage

6 8 12 14 16 18 20 22 24

Type (ton)

112 231

12231

2-1. Outline of 3WAY VRF SYSTEM

CAUTION

Outline of 3WAY VRF SYSTEM

1 - 5

2. Features of 3WAY VRF SYSTEM

12, 14, 16 Ton

18, 20, 22, 24 Ton

6, 8 Ton

Outdoor unit model name ended with letters "U9E". Refer to the Section 1 "3. Salt-Air Damage Resistant Specifications".

Dimensions

Dimensions of unit combinations

Top view

Air

intake

Air

intake

Air

intake

Air

intake

31-1/8

(Installation hole pitch)

(Ceiling panel dimensions)

36-1/4

(Installation hole pitch)

37-1/2

(Maximum dimensions)

(Ceiling panel dimensions)

36-1/4

(Installation hole pitch)

37-1/2

(Maximum dimensions)

(Ceiling panel dimensions)

74 (Ceiling panel dimensions)

7-7/8

(Ceiling panel dimensions)

31-1/8

(Installation hole pitch)

31-1/8

(Installation hole pitch)

70-1/8

(Installation hole pitch)

(Ceiling panel dimensions)

113 (Ceiling panel dimensions)

(Ceiling panel dimensions)

36-1/4

(Installation hole pitch)

37-1/2

(Maximum dimensions)

8/7-78/7-731-1/8

(Installation hole pitch)

31-1/8

(Installation hole pitch)

31-1/8

(Installation hole pitch)

109-1/16 (Installation hole pitch)

Unit: in.

6-Ton

8-Ton

U-72MF1U9

U-72MF1U9E

U-96MF1U9

U-96MF1U9E

Outline of 3WAY VRF SYSTEM

1 - 6

2. Features of 3WAY VRF SYSTEM

Capacity control

The compressor combination (DC inverter compressor + constant-speed compressor) allows smooth capacity control from

0.6-Ton to 24-Ton.

Realization of smooth capacity control

from 0.6-Ton to 24-Ton

Comp. HP Unit1(main) Unit2(sub1) Unit3(sub2)

DC comp. 4.0 4.0 4.0

AC comp. 5.0 5.0 5.0

*24 Ton = U-96MF1U9 (U-96MF1U9E) Type x 3

In case of 24-Ton system

Capacity

(Ton)

DC1

DC2

AC1

AC2

AC3

DC1

DC2

DC3

DC1

DC2

DC3

AC1

DC1

DC2

AC2

AC1

DC2

LOAD

---

Example of 3 unit connection

Unit 1

AC1

DC1

Unit 2

AC2

DC2

Unit 3

AC3

DC3

Capacity control is possible smoothly with a DC

inverter compressor. The right graph shows the

image of the operating combination of compres-

sors in case of 24-Ton system. In actual operation,

the combination will be changed by operating

condition, operating time amount, priority of com-

pressor and so on.

Outline of 3WAY VRF SYSTEM

1 - 7

3. Salt-Air Damage Resistant Speciﬁ cations

Specifications

Hot-dip zinc-coated

steel sheet

Polyester powder double coating

(both sides)( m)40

Polyester powder double coating

(both sides) ( m)120

Hot-dip aluminum-zinc

coated steel sheet

Polyester powder double coating

(both sides) ( m)120

No treatment

Resin (Polypropylene) No treatment

No treatment

Fin Aluminum

Tube Copper No treatment Zinc rich treatment (whole)

Tube plate

Hot-dip zinc-coated

steel sheet

Zinc rich treatment (whole)

Fan

Propeller fan

Resin

Hot-dip zinc-coated

steel sheet

Aluminum

No treatment

Motor maker's standard spec.Motor

Installation frame

Electrical component box

SUS410

Hexavalent chromium-free

coating

Stud supplementary

bracket

Hot-dip zinc-coated

steel sheet

Accumulator

Receiver tank

Steel Epoxy coating + alkyd coating

Refrigeration

cycle tube

Welded portion Copper tube No treatment Urethane coating

Dessicant coating

Outer surface Copper tube No treatment Urethane coating

Fixing bracket

Hot-dip zinc-coated

steel sheet

Hot-dip zinc-coated

steel sheet

Hot-dip zinc-coated

steel sheet

Polyester powder double coating

(both sides) m)120(

Relevant Parts Material Standard Specifications

Salt-Air Damage Resistant

Specifications

Outdoor unit model name ended

with letters "U9E".

Outer box/side plate/

drain pan

between the stud

Base frame

Fan guard

No treatment

3 Contact us for the delivery schedule.

1 Consult us before introducing a salt-air damage resistant model as it requires a special treatment.

2 The specifications are subject to change without notice for development.

Zinc rich double coating + urethane

coating m)70(

Polyester powder double coating

(both sides) m)80(

Tapping screws

m) 30 (PC board --

Motor maker's spec. for salt-air

damage resistant (urethane coating)

Zinc rich treatment

Polyester powder coating( 120 m)

Hexavalent chromium-free coating +

urethane coating

Polyester powder double coating

(both sides) 120 m)(

No treatment

Heat

Exchanger

Urethane coating

(m)30

( 120 m)

Notes:

Urethane coating

(m)30

– MEMO –

1 - 8

Design of 3WAY VRF SYSTEM

2 - 1

Contents

2. DESIGN OF 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator ........................................................................2-2

2-21-1. Operating Range .............................................................................................................

2-31-2. Procedure for Selecting Models and Calculating Capacity ...........................................

2-41-3. Tubing Length .................................................................................................................

2-61-4. Tubing Size......................................................................................................................

2-81-5. Installation Standards......................................................................................................

2-91-6. Straight Equivalent Length of Joints ...............................................................................

2-101-7. Check of limit density ....................................................................................................

2-11................................................................8-1 Calculation of Actual Capacity of Indoor Unit

2-517-2.

Solenoid Valve Kit for 3WAY VRF System ......................................................................

2-405. HOW TO PROCESS TUBING ..........................................................................................

2-477. Optional Parts ..................................................................................................................

2-415-2. Connecting Tubing Between Indoor and Outdoor Units .............................................

2-405-1. Connecting the Refrigerant Tubing ..............................................................................

2-425-3. Insulating the Refrigerant Tubing .................................................................................

2-435-5. Finishing the Installation................................................................................................

2-477-1.

Distribution Joint Kits

.....................................................................................................

2-446. AIR PURGING .................................................................................................................

2-44Air Purging with a Vacuum Pump (for Test Run) Preparation ..................................

................................................................................................................. 2-182. System Design

2-182-1. System Example............................................................................................................

2-23............................................................................................2-3. Installing Distribution Joint

2-20.......2-2. Example of Tubing Size Selection for Extension and Additional Charge Amount

2-243. Electrical Wiring ..............................................................................................................

2-243-2.

Recommended Wire Length and Wire Diameter for Power Supply System ..................

2-243-1. General Precautions on Wiring .....................................................................................

2-253-3. Wiring System Diagrams...............................................................................................

2-283-4. Important Note When Wiring for Common Type ..........................................................

2-313-5. Important Note When Wiring for Y1 Type ....................................................................

2-324. Installation Instructions ..................................................................................................

4-6. Dimensions of Wind Ducting

2-35Reference diagram for snow-proof ducting (field supply)............................................

2-324-1. Selecting the Installation Site for Outdoor Unit ............................................................

2-33.....................................................................2-4 Removing Fin Guard for Heat Exchanger

2-33.......................................................................3-4 Shield for Horizontal Exhaust Discharge

2-33.........................................................4-4 Installing the Outdoor Unit in Heavy Snow Areas

4-5. 2-33Precautions When Installing in Heavy Snow Areas ......................................................

2-34Reference diagram for air-discharge chamber (field supply).......................................

2-364-8. Transporting the Outdoor Unit .....................................................................................

2-364-9. Installing the Outdoor Unit ............................................................................................

2-374-10. Remove the Brackets Used for Transport ..................................................................

2-384-13. Connect the Tubing.....................................................................................................

2-374-11. Routing the Tubing ......................................................................................................

Refer to the 2WAY VRF SYSTEM TECHNICAL DATA (TD831157)

2-32Outdoor Unit ..................................................................................................................

Indoor Unit

2-435-4. Taping the Tubes ..........................................................................................................

2-161-10. ...Capacity Correction Graph According to Tubing Length and Elevation Difference

2-15................................9-1 Capacity Correction Graph According to Temperature Condition

4-7. Dimensions of Snow Ducting

2-384-12. Prepare the Tubing......................................................................................................

Design of 3WAY VRF SYSTEM

2 - 2

1. Model Selecting and Capacity Calculator

1-1. Operating Range

Heating and Cooling

104

113

Operating

range

-4

Indoor air intake temp. F (DB)

Operating

range

50 59

68 77 86

68 77

68 77 86 95

-4

Outdoor air intake temp. F (WB)

Operating

range

Cooling

Heating

Outdoor air intake temp. F (DB)

Outdoor air intake temp. F (WB)

Indoor air intake temp. F (WB)

Indoor air intake temp. F (DB)

Design of 3WAY VRF SYSTEM

2 - 3

1. Model Selecting and Capacity Calculator

Select the model and calculate the capacity for each refrigerant system according to the procedure shown below.

Calculation of the indoor air-conditioning load

Calculate the maximum air-conditioning load for each room or zone.

Selection of an air conditioning system

Select the ideal air conditioning system for air conditioning of each room or zone.

Design of the control system

Design a suitable control system for the selected air conditioning system.

Preliminary selection of indoor and outdoor units

Make preliminary selections that are within the allowable range for the system

......... 2-4 ~ 2-10

Check of the tubing length and elevation difference

Check that the length of refrigerant tubing and the elevation difference are within the allowable

ranges.........................................................................................................................................

2-4

Calculation of the corrected outdoor unit capacity

Capacity correction coefficient for model................................................................................

2-11

Capacity correction coefficient for outdoor temperature conditions...........................

2-11, 13, 15

Capacity correction coefficient for tubing length and elevation difference........................

2-11, 14

Heating capacity correction coefficient for frosting/defrosting..........................................

2-11, 13

Calculation of the corrected capacity for each indoor unit

Capacity correction coefficient for indoor temperature conditions....................................

2-11, 14

Capacity distribution ratio based on the tubing length and elevation difference..............

2-11, 14

Calculation of the actual capacity for each indoor unit

Calculate the corrected indoor/outdoor capacity ratio, based on the corrected outdoor unit

capacity and the total corrected capacity of all indoor units in the same system. Use the result to

calculate the capacity correction coefficient for the indoor units.................................

2-11 ~ 2-15

Multiply the corrected capacity of each indoor unit by the capacity correction coefficient to calcu-

late the actual capacity for each indoor unit...........................................................................

2-12

Recheck of the actual capacity for each indoor unit

If the capacity is inadequate, reexamine the unit combinations.

Example 1: Increasing the outdoor unit capacity....................................................................

2-18

Example 2: Increasing the indoor unit capacity......................................................................

2-19

Increasing the tubing size........................................................................................................

2-20

Design of tubing

Create a tubing design which minimizes the amount of additional refrigerant charge as much as

possible...........................................................................................................................

2-4 ~ 2-6

If tubing extension for additional unit is expected in the future, create the tubing design with

adequate consideration for this extension.

Select the tubing size for the main tube (LA) up to the No. 1 distribution joint based on the rated

cooling capacity of the outdoor unit. Select tubing sizes after the distribution point based on the

total rated cooling capacity of the connected indoor units.

Increasing the tubing size of the wide tubes can reduce the loss of capacity caused by longer

tubing lengths. (Only the main wide tube with the largest tube diameter (main tube LA and main

tubes after the distribution point that are the same size as LA) can be changed.) In this case, it is

necessary to recalculate the actual indoor unit capacities.....................................................

2-20

Calculation of additional refrigerant charge amount

Calculate the additional refrigerant charge from the diameters and lengths of the refrigerant tub-

ing. Even if the wide tubing diameter was increased, determine the additional refrigerant charge

based only on the narrow tubing size.....................................................................................

2-21

Check the minimum indoor capacity (limit density) with respect to the amount of refrigerant. If the

limit density is exceeded, be sure to install ventilation equipment or take other corrective steps.

2-22

Design of electrical wiring capacity

Select a wiring capacity according to the method of power supply.......................................

2-24

1-2. Procedure for Selecting Models and Calculating Capacity

Model Selection Procedure

Design of 3WAY VRF SYSTEM

2 - 4

1. Model Selecting and Capacity Calculator

Item Mark Contents Length (ft.)

Actual length 492

574

L (L2 – L4)

131

LM 262

...

L1+

984

+LF+LG+LH

164

131

L = Length, H = Height

6.6

Table 2-1 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights

Allowable tubing

length

Allowable elevation

difference

Allowable length of

joint tubing

Equivalent length

Max. tubing length

Difference between max. length and min.

length from the No. 1 distribution joint

Max. length of main tubing (at max. diameter)

Max. length of each distribution tube

Distance between outdoor units

When outdoor unit is installed higher than indoor unit

When outdoor unit is installed lower than indoor unit

Max. difference between indoor units

Max. difference between outdoor units

T-joint tubing (field-supply); Max. tubing length between

the first T-joint and solidly welded-shut end point

NOTE

The outdoor connection main tubing (LO portion) is determined by the total capacity of the outdoor units that

are connected to the tube ends.

If the longest tubing length (L1) exceeds 295 ft. (equivalent length), increase the sizes of the main tubes (LM)

by 1 rank for the discharge tubes, suction tubes, and narrow tubes. (field supplied)

If the longest main tube length (LM) exceeds 164 feet, increase the main tube size at the portion before 164 ft.

by 1 rank for the suction tubes and discharge tubes. (field supplied)

(For the portion that exceeds 164 feet, set based on the main tube sizes (LA) listed in the table on the following page.)

Total max. tubing length including length of

each distribution tube (only liquid tubing)

1-3. Tubing Length

Select the installation location so that the length and size of refrigerant tubing are within the allowable range shown

in the figure below.

2. Main distribution tubes LC – LH are selected according to the capacity after the

distribution joint.

The outdoor connection main tubing (LO portion) is determined by the total capacity of the

outdoor units that are connected to the tube ends.

Sizes of indoor unit connection tubing 1 – 40 are determined by the connection

tubing sizes on the indoor units.

Main tubing length LM = LA + LB … < 262 ft

Be sure to use special R410A distribution joints (CZ: purchased separately) for outdoor

unit connections and tubing branches.

Note: Do not use commercially available T-joints for the liquid tubing and parts.

Solidly welded shut

(pinch weld)

Balance tubing

LB LC

LE L3

Solenoid valve kit

T-joint tubing

(header joint system)

R410A distribution joint

CZ-P900PH1U

(for outdoor unit)

CZ-P224BH1U (for indoor unit)

CZ-P680BH1U (for indoor unit)

CZ-P1350BH1U

(for indoor unit)

(ø3/8")

Explanation of symbols

Distribution joint

(purchased separately)

Ball valve (field supply)

T-joint (field supply)

For

extension

For

extension

Max.1.3 ft

Design of 3WAY VRF SYSTEM

2 - 5

1. Model Selecting and Capacity Calculator

Refrigerant Charge Amount at Shipment (for outdoor unit)

U-72MF1U9 U-96MF1U9

U-72MF1U9E U-96MF1U9E

(oz)

416 416

System Limitations

Max. No. allowable connected outdoor units 3

Max. capacity allowable connected outdoor units 288,000 BTU/h (24-Ton, 84 kW)

Max. connectable indoor units 40

Max. allowable indoor/outdoor capacity ratio 50 – 130 %

*1: Up to 3 units can be connected if the system has been extended.

Additional Refrigerant Charge

Additional refrigerant charge amount is calculated from the liquid tubing total length as follows.

Amount of Refrigerant Charge Per ft., According to Liquid Tubing Size

Liquid tubing size Amount of refrigerant

(in. (mm)) charge (oz/ft.)

ø1/4" (ø6.35) 0.279

ø3/8" (ø9.52) 0.602

ø1/2" (ø12.7) 1.38

ø5/8" (ø15.88) 1.99

ø3/4" (ø19.05) 2.78

ø7/8" (ø22.22) 3.93

Required amount of additional refrigerant charge = [(Amount of

additional refrigerant charge per ft. of each size of liquid tube ×

its tube length) + (...) + (...)] + [Necessary amount of additional

refrigerant charge per outdoor unit + (...) + (...)]

* Always charge accurately using a scale for weighing.

Table 2-1-1 Necessary Amount of Refrigerant Charge Per Outdoor Unit

U-72MF1U9

U-72MF1U9E

U-96MF1U9

U-96MF1U9E

42 oz/unit 42 oz/unit

Design of 3WAY VRF SYSTEM

2 - 6

1. Model Selecting and Capacity Calculator

Table 2-2 Main Tubing Size (LA)

192,000

(56.3)

166

72,000

(21.1)

96,000

(28.1)

139,000

(40.7)

168,000

(49.2)

203,000

(59.5)

240,000

(70.3)

264,000

(77.4)

288,000

(84.4)

BTU/h

(kW)

Total system tonnage

Combined outdoor

models

Suction tubing

Discharge tubing

Liquid tubing

Unit: in. (mm)

ø7/8"

(ø22.22)

(ø19.05)

ø3/4"

ø3/8"

(ø9.52)

ø1-1/8"

(ø28.58)

ø7/8"

(ø22.22)

ø1/2"

(ø12.7) (ø15.88)

ø5/8"

ø1-3/8"

(ø34.92)

ø1-1/8"

(ø28.58)

ø3/4"

(ø19.05)

U-96MF1U9(E)

U-72MF1U9(E)

U-96MF1U9(E)

U-72MF1U9(E)

U-96MF1U9(E)

U-72MF1U9(E)

U-72MF1U9(E)U-96MF1U9(E)U-72MF1U9(E)

U-72MF1U9(E)

(ø15.88)

ø5/8"

ø3/4"

(ø19.05)

1-4. Tubing Size

*1: If future extension is planned, select the tubing diameter based on the total tonnage after extension.

However extension is not possible if the resulting tubing size is two ranks higher.

*2: The balance tube (outdoor unit tube) diameter is ø3/8" (ø9.52).

*3: Type 1 tubing should be used for the refrigerant tubes.

*4: If the length of the longest tube (L1) exceeds 295 ft. (equivalent length), increase the main tube (LM) size by 1 rank for the

suction, discharge, and liquid tubes. (Use field-supply reducers.) (Select from Table 2-2 and Table 2-7.)

*5: If the longest main tube length (LM) exceeds 164 ft., increase the main tube size at the portion before 164 ft. by 1 rank for

the suction tubes and discharge tubes.

(For the portion that exceeds 164 ft., set based on the main tube sizes (LA) listed in the table above.)

Size of tubing (LO) between outdoor units

The outdoor unit connection tubing (LO) is

determined by the total capacity of the outdoor

units connected to the tube ends. The tubing

size is selected based on the table of main

tube sizes after the branch.

If the total capacity of the indoor units con-

nected to the tube ends is different from the

total capacity of the outdoor units, then the

main tube size is selected based on the total

capacity of the outdoor units.

(For LA, LB, and LF in particular)

(ø28.58)

(ø15.88) (ø19.05) (ø22.22)(ø12.70)

–

24.200

85.300

54.600

85.300

–

334.400

(ø19.05)

102.400

124.200

143.300

(ø22.22) (ø22.22)

143.300

162.400

(ø28.58)

162.400

Unit: in. (mm)

ø3/8" (ø9.52)

72,000

(21.1)

96,000

(28.1)

Flare connection

Brazing connection

ø3/8" (ø9.52)

Flare connection

Balance tubing

Liquid tubing

Discharge

tubing

Suction tubing

BTU/h

(kW)

ø5/8"

(ø15.88)

ø3/4"

(ø19.05)

ø3/4"

(ø19.05)

ø7/8"

(ø22.22)

Table 2-4 Outdoor Unit Tubing Connection Size ( A – D )

Table 2-3 Main Tubing Size After Distribution (LB, LC...)

Select the size of tubing between outdoor units based on the main tubing size (LA) as given in the table above.

258.000

334.400

238.900 258.000

Total capacity

after distribution

Tubing size

Total capacity

after distribution

Tubing size

Below BTU/h

Over BTU/h

Suction tubing

Discharge tubing

Liquid tubing

Below BTU/h

Over BTU/h

Suction tubing

Discharge tubing

Liquid tubing

238.900

200.600

ø1-1/8"

(ø28.58)

102.400

24.200

ø1-1/8"ø1-1/8"ø1-1/8"ø1-1/8"ø7/8"

ø3/4"ø3/4"ø5/8"

(ø15.88) (ø19.05) (ø19.05) (ø22.22)

(ø28.58)

ø1/2" ø5/8" ø5/8" ø3/4"

ø3/4"

ø7/8"

ø7/8" ø7/8" ø1-1/8"

(ø15.88)

ø3/8" ø3/8" ø3/8" ø3/8"

ø1/2"

ø5/8"ø5/8"

(ø15.88)

(ø15.88)(ø12.70)

(ø12.70)

(ø9.52)(ø9.52)(ø9.52)(ø9.52)

ø3/4"ø3/4"ø3/4"

(ø19.05) (ø19.05) (ø19.05)

If the size of tubing (LA) is less than 16.4 feet,

it is recommended that the tubing diameter be

larger than ø7/8" (ø22.22).

If the size of tubing (LA) is less than 16.4 feet,

it is recommended that the tubing diameter be

larger than ø1-1/8" (ø28.58).

*1:

*2:

ø1-3/8" ø1-3/8" ø1-1/2"

(ø41.28)(ø34.92)(ø34.92)

ø1-1/8" ø1-1/8" ø1-1/8"

(ø28.58)(ø28.58)(ø28.58)

Unit: in. (mm)

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Panasonic U-72MF1U9E Service & Technical Guide

Brand: Panasonic

Model: U-72MF1U9E

Category: Split-system air conditioners

Type: Service & Technical Guide

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Panasonic U-72MF1U9E Service & Technical Guide

Panasonic U-72MF1U9E Service & Technical Guide

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